void __4_3_7__HALF_DUPLEX_BACK_PRESSURE() {
    /**
     * @group:       	4.3.7 HALF-DUPLEX BACK PRESSURE
     *
     * @description:	A half-duplex back pressure option (non-IEEE 802.3 standard) is also provided. The activation and deactivation condi-
     *					tions are the same as in full-duplex mode. If back pressure is required, the device sends preambles to defer the other
     *					stations' transmission (carrier sense deference).
     *					To avoid jabber and excessive deference (as defined in the 802.3 standard), after a certain time, the device discontinues
     *					the carrier sense and then raises it again quickly. This short silent time (no carrier sense) prevents other stations from
     *					sending out packets thus keeping other stations in a carrier sense deferred state. If the port has packets to send during
     *					a back pressure situation, the carrier sense type back pressure is interrupted and those packets are transmitted instead.
     *					If there are no additional packets to send, carrier sense type back pressure is reactivated again until chip resources free
     *					up. If a collision occurs, the binary exponential back-off algorithm is skipped and carrier sense is generated immediately,
     *					thus reducing the chance of further collision and carrier sense is maintained to prevent packet reception.
     *					To ensure no packet loss in 10BASE-Te or 100BASE-TX half-duplex modes, the user must enable the following:
     *					• No excessive collision drop (Switch MAC Control 1 Register)
     *					• Back pressure (Port MAC Control 1 Register)
     *
     */
}